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sdns vs Blocky: catalog facts
sdns	Blocky
Free Free to use from its GitHub repository.	Free The open-source software is available without a license fee. Hosting, hardware and…
Linux, Self-hosted, Command line	Windows, macOS, Linux, Self-hosted, Command line
Full recursive resolution without a public upstream Built-in blocklist filtering	One small binary with no database, ideal for containers and small boards Per-client and per-group blocking rules, with encrypted upstream resolvers
Configured by file with no graphical interface Smaller community than Unbound or Pi-hole	Configuration is YAML only; there is no built-in administration interface
Self-hosted	Self-hosted
Closed source	Open source
License not stated	License: Apache-2.0
No account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked September 22, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.